英文字典中文字典51ZiDian.com
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preadmission 提前进气 提前进气 Preadmission \Pre`ad*mis"sion\, n.
Lit., previous admission; specif. (Engin.), admission, as of steam, to the engine cylinder before the back stroke is completed, thus increasing the cushioning. [Webster 1913 Suppl.]
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